Check valve can be installed on the upward horizontal line or vertical line or any middle parts.
Check valve can be installed on the upward horizontal line or vertical line or any middle parts.
止回阀可以安装在与上向流水平或垂直的直线上或任何中间位置。
Check valve can be installed on the upward horizontal line or vertical line or any middle parts.
止回阀可以安装在与上向流水平或垂直的直线上或任何中间位置。